Die-stock.



J. B. MARTENS.

DIE STOCK.

APPLICATION FILED MAY 4. I9l6.

Patented Dec. 26, 1916.

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J. B. MARTENS.

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Specification of Letters l fatent.

Patented Dec. 2a, 1916.

Application filed. May 4., 1915. Serial No. 95,482.

To all whom it may concern: I

Be it known that LJO-HN B. MAn'rENs, a citizen of the United States, residing at Cleveland, in the county of Guyahoga and State of Ohio, have invented a certain new and useful Improvement iuDie-Stocks, of which the following is a full, clear, and

exact description, reference being had to the terior, with" the guiding bushings immediately adjacent on the outside. This enables the threading of very short pipes, if desired. Access to the dies is provided by separation of the frame. My die stock'has a number of other specific advantages which will become apparent from the following description of a preferredembodiment of it.

In the drawings, Figure 1 is a side elevation of the die stock, the handles being partly indicated by broken lines; Fig; 2 is an end view of the die stoclqFig. 3 is an elevation looking at the inner face of one of the two halves of the die stock; Fig. 4 is a central cross section.

Myinvention readily adapts itself for a die stock carrying four sizes of dies, and such is theconstruction shown in the above drawings. Whenthe number of dies carried an even number, it is possible to make the stock in two parts, which are exact duplicates of each other, thus simplifying the construction and reducing the cost.

As shown in the drawings, the frame of the stock consists of two identical castings designated 10-10. Each casting comprises mainly two substantially flat sides 11 and 12 at right angles to each other; two sleeves 13 and 14 on the outer face of the sides (located centrally andradially and securedby flaring portions 15) tubular ears 16 and 17 at the free edges of the sides, and inwardly extending arms 18 and 19 at the ends of the side portions. When two castings having characteristics above described areplaced edge to edge, they provide a hollow four sided box-like frame. The ears 16 and 17 of one casting alinewith the corresponding ears of the other casting, and the end arms other. In thisposition the two castings are secured. together by 'pintles occupying the alined ears at the edges of the castings. These pintles may readily be in the form of boltsz20 with thumb heads 21 and nuts 22 on the other ends. Where the two end arms overlap they have registering threaded holes and 31 which are concentric of the axis of the stock. Into these holes the handles 35 are screwed.

I have thus provided very simply, a hollow four sided frame provided with handles projecting from its ends and provided with four radially located sleeves. Each of the side portions is adapted to carry dies for threading a pipe, while the sleeves are adapted to carry corresponding bushings for centering the pipe to be threaded. One of the bushings is indicated at 10. They are adapted to beheld in the sleeves by thumb screws 11. These bushings are of the usual form. They preferably have flanges overhanging the ends of the sleeves and have recesses for the reception of the thumb screw.

The bushings vary only in interior diameter,

according to the sizes of pipe to whichthe dies correspond.

In the construction illustrated. there are four sets of dies, each set consisting of two die blocks 50 and 51 carried on the inner 1.8 and19ofthe two castings overlap each u side of a side portion of the frame. Each tween the side ribs by screw bolts'TO. which pass through the dies into the side portions.

The dies are accurately locked in position by set screws 71 threaded through the end arms 18 and19 and bearing against the ends of the dies. The arms are reinforced at these points by bosses 7 3 on the inner faces of the arms 18 and bosses 72 on the outer faces of the arms 19. These set screws take up any looseness around the bolts 70, and the bolts and set screws together accurately hold the dies in position.

With such a construction as described it is very simple to turn a thread on a pipe of the desired size, the pipe being suitably held and the bushing passed over it and the die stock turned to cause the die to cut the thread in the usual manner. By having the capacity in one tool for four sizes, the plumber has at his disposal means for turning all of the threads usually encountered in his class of work; for instance, one tool may provide for threading pipes known as three-eighths, one-half, three-fourths and one inch, respectively. For other classes of work other sizes of dies may be used.

To change the dies it is only necessary to take out one or both of the pintles 20, thus leaving the halves hinged together on the other pintle, or entirely disconnecting the halves, if both bolts are removed. It should be noted that any looseness at the hinge pintles does not change the accuracy of the presentation of the bushing to the die, as each sleeve is rigidly connected with the part of the structure which carries the corresponding pair of dies. However, there need be no material looseness between the two halves of the die stock for the handles screwing into the overlapped end arms securely lock the two halves together.

By carrying the die on the inner side of the frame and the bushing directly outside thereof, a much shorter pipe may be threaded than where the pipe passes clear through the stock on its diameter, as has been done heretofore. Moreover, the in terior location of the dies protects them from accident. Should the die stock happen to be dropped, the form of the body and the location of the handles is such that the set screw heads would be out of contact with the floor or surface on which the stock struck, and would thus be protected from any displacement. The interior location of the dies not only protects them, but also makes it easier to keep them oiled.

One of the advantages of my die stock is its cheapness of construction. It uses standard dies, standard guide bushings, standard screws and standard handles. The two parts of the frame being identical, a single pattern is required for casting. The machine work on the castings is simple and readily effected. The threading of the end arms is preferably reserved until the ears are drilled and the two parts fastened together so that overlapped arms may be threaded at one operation. Inuse, the stock has the desired rigid frame, while by simply screwing out the handles and taking out one of the hinge bolts, access is allowed to the interior for changing the dies. By locating all the dies in the same radial. central plane, the die stock is always central and balanced in use.

Having thus described my invention, what I claim is:

1. In a multiple die stock, the combination of a plurality of separable frame members, dies carried by the frame members, said frame members having overlapping end portions, and handles for the die stock each closely engaging the corresponding overlapping end portions.

2. In a multiple diestock, the combination with a plurality of separable members adapted to form a'hollow frame, sets of dies carried by said members, each of said members having inwardly extending end portions, handles for the die stock, each threaded into the adjacent end portions and thereby preventing relative movement of the parts.

3. In a, multiple die stock, the combination of a hollow polygonal frame, dies carried thereby on the inner sides of the frame, and means for holding radial bushings on the outer sides of the frame and respectively on the same side of the frame axis as the dies with which they cooperate.

a. In a die stock, the combination of a hollow frame having a plurality of substantially flat sides, dies secured to the inner face of said sides, rigidly held radial sleeves on the outer side of the respective dies, and handles secured to the ends of the frame.

5. In a multiple die stock, the combination of a hollow frame having a plurality of in terior faces,'guide ribs along the edges of such faces, sets of dies between such ribs and clamped'against the faces from the inner sine of th frame, and guide sleeves carried radially on the outer face of the same side of the frame opposite the center of said interior faces. i

6. In a multiple die stock, the combination of a hollow frame having a plurality of substantiallv fiat faces, base ribs in each face, guide ribs along each face, a plurality of dies for each face, said dies being located between the guide ribs and resting against the base ribs, clamping screws passing through such dies into the frame, set screws carried bv the frame bearing against the ends of the dies, and means on the outer side of the frame for positioning a pipe centrally with reference to the dies.

7 In a multiple die stock, the combination of relatively movable members, means for securing them together to make a hollow frame about an axis, and sets of dies and guide sleeves rigidly carried by said members radially about said axis.

8. In a multiple die stock. the combination of frame members having ears at their edges, pins occupying said ears for holding the members together to make a hollow box-like frame, and means on themembers for carrying dies and bushings.

9. In a multiple die stock, the combination of members ca rying dies on their inner sides and guide sleeves on their outer sides, ears at the edges of said members, and pins passing through said ears to hold them together to make a hollow frame.

'10.- In a multiple die stock, the combination of a hollow frame composed of members provided with overlapping end portions, handles extending through openings in the overlapped parts, and means on the members for carrying dies and bushings.

, 11. In amultiple die stock, the combination of a hollow box-like frame made up of members having ears at their edges and pins occupying said ears for holding the members together, said members being provided with overlapping inwardly extending arms, handles extending through openings in the overlapped arms, and means on the members for carrying dies and bushings.

12. In a multiple die stoclnthe combination. of a four sided frame made of two castings, each constituting two adjacent sides, means for securing the castings together at their edges, and means on the castings for carrying dies and guide bushings.

13. In a multiple die stock, the combina tion of a four sided frame made of two castings, each constituting two adjacent sides, means for securing the castings together at their edges, means on the castingsfor carrying dies on the inner sides of the four members, each of said four portions having on its outer side a rigidly carried centrally placed radial sleeve.

14. In a multiple die stock, thecombination of a four sided frame made of two castings, each constituting two adjacent sides and provided with hinge-ears at its edges, pins occupying the hinge ears of both castings, and means on the castings for carrying dies and guide bushings at each of the four sides.

15. In a multiple die stock, the combination of two identical castings, each comprising a pair of side portions at right angles to each other and transverse sleeves on the outer sides of such portions and tubular ears at edges of such portions, two of such castings being adapted to be placed together to make a square hollow frame with the ears alining, pins occupying the alined ears, and dies secured on the inner faces of the four sides, and bushings occupying the sleeves.

16. In a multiple die stock, the combination of two identical castings, each comprising a pair of plate-lite portions at right an gles to each other, and inwardly extending end arms, two of such castings being adapted to be held together to make a square hollowframe with the end arms overlapping,

handles extending through openings in the overlapped end, arms, dies secured on the inner face of the four sides, and bushings occupying radial sleeves on the exterior of the sides. I

17. In a multiple die stock, the combination of a hollow frame comprising plurality of sides arranged about an axis, dies carried on the inner faces of said sides, each of said dies being opposite a die on the other side of the axis, and. guides carried. by the frame on the outer faces of the frame sides in position to cooperate with the dies on the same side of the frame axis.

18.. In a multiple die stock, the combination of a hollow frame, a pair of handles therefor extending in opposite directions from the frame and located along the axis thereof, dies on the inner sides of said frame, and guides on the outer sides of the frame, each guidebein'g on the same side of the frame axis asthe die with which it cooperates.

19. In a multiple die stock, the combinati on of a hollow box-like frame having a plurality of faces arranged about an axis, dies carried on the'interior of said faces, set screws carried by the frame for adjusting the dies, and bushings carried by the frame on the outer sides of the respective dies with which the bushings cooperate.

20. In a multiple die stock, the combination of a hollow frame extending about an axis, dies secured on the inner face of the frame and arranged radially aboutthe axis, and guide sleeves on the outer sides of the frame arranged radially about the axis, each sleeve being on the same side of the axis as the die with which it coacts.

21. In a multiple die stock, the combination of a hollow frame extending about an axis, diessecured on the inner face of the frame and arranged radially about the axis, guide sleeves on the outer sides of the frame arranged radially about the axis, each sleeve being on the same side of the axis as the die with which it coacts, end members for the frame, and" handles located at the axis and engaging said end members.

22. In a multiple die stock, the combine. tion of a hollow frame about an axis and composed of a plurality of members removably secured together, whereby access may be allowedto the interior, dies carried on such interior, and guide sleeves coacting with said dies located on the outer sides thereof.

23. In a multiple die stock, the oombina tion of a hollow box-like frame made of a plurality of members separably connected together to extend about an axis, dies arranged radially about said axis and secured to the inner faces of said members, guide sleeves arranged radially about the axis and secured on the outer faces of said members,

each guide sleeve coacting with the die on the same side of the axis of the frame.

24. In a multiple die stock, the combination of a hollow box-like frame made of a plurality of members separably connected together to extend about an axis, dies arranged radially about said axis and secured to the faces of said members, guide sleeves arranged radially about the axis and secured on the outer faces of said members, each guide sleeve coacting with the die on the same side of the axis of the frame, and removable handles secured to the frame 7 substantially in line with the axis thereof.

frame on the exterior, overlapping end mem- H bers for the frame, and handles occupying openings in the overlapped parts.

27. In a multiple die stock, the combination of a hollow frame extending about an axis, dies on the interior of the frame, bushings 0n the exterior, each bushing cooperating with a die on the same side of the axis.

28. The combination of a hollow box-like frame providing a plurality of faces, dies on the inner sides of said faces, and oooperating guide sleeves for the respective dies on the outer sides of the same faces. In testimony whereof, I hereunto afiix my signature.

JOHN B. MARTENS.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

. Washington, D. 0. 

